You guys are wasting time and money. Here is a trade tip....that actually works everytime.
You can take the filters out, but I leave mine in.
This kills all bacteria in system, washes the condenser/evaporator and as a bonus removes all odours such as dog/cigarette smells from the headlining and upholstery.
Place a kettle in the passenger footwell, centrally near a/c intake ducts.
Rig switch to boil constantly (keep an eye on level and top up in needed)
Run engine and put a/c on recirculate, open all vents and put switch to face on max power.
Close doors and windows and leave for 20 mins.
After 20 mins remove kettle and run a/c on outside intake for 5-10 mins to clear steam etc. Nothing gets wet or soggy so dont fret about the electrics, the a/c working keeps everything dry.
Thats it. Nothing beats this as the steam is sucked through the whole system washing and killing bugs in the process. I guarantee this works, I have done it on loads of cars with 100% success, dont buy smelly products from car stores, dont get ripped off with Lexus aircon services, save money and see instant results.